Universitas Indonesia, 2001
UI - Skripsi (Membership)
Universitas Indonesia, 1990
UI - Skripsi (Membership)
Universitas Indonesia, 2001
UI - Skripsi (Membership)
Sitinjak, Robert Parlindungan, author
Universitas Indonesia, 1991
UI - Skripsi (Membership)
Yusuf Shofie, author
2010
UI - Disertasi (Open)